Blind-hinge.



J. H. KNOWLES.

BLIND HINGE.

APPLICATION FILED JAN. 24, 1914.

1,096,727. Patented May 12, 1914.

JAMES H. KNOWLES, 013 PROVIDENCE, RHODE ISLAND.

BLIND-HINGE.

Specification of Letters Patent.

Patented May 12, 1914..

Application filed January 24, 1914. Serial No. 814,217.

To all whom it may concern Be it known that I, JAMES H. KNOWLES, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented a new and. useful Improvement in Blind- Hinges, of which the following is a specification.

This invention relates to certain new and useful improvements in blind hinges, and the primary object of the invention is to provide a blind hinge which is of novel and improved construction and embodies means for effecting positive locking of the blind in either open or closed position.

Further, the invention aims to provide locking means, which is positive and certain and which effectively holds the blind locked in its two stated positions, and to also provide locking means which affords a large area or looking surface to thus insure absolute retention of the blind in either open or closed position.

In the drawings ;-Figure 1 is a perspective view of the invention, the blind being shown in fragment in dotted lines. Fig. 2 is a section taken on the line 2-2 of Fig. 1, and Fig. 3 is a top plan view, partly broken away.

In accordance with the present invention, the stationary leaf member of the hinge is composed of a base plate 1 which is attached to the window frame, and which has a rigid arm 2 projecting outwardly therefrom, the arm 2 having a vertically disposed pintle 3, which extends upwardly from the arm 2, and has a retaining stud 4 at its top or head portion.

The arm 2 is possessed of opposite flat parallel vertical faces for a purpose later set forth. The other leaf member of the hinge is of substantially T-shape in general outline, the shank 5 of which is secured to the blind in the usual manner. The head 5 of the second named leaf member has an outwardly projecting knuckle 6 provided with an aperture 7 shaped to receive the retaining stud l, whereby after the latter is passed through the aperture, the stud 4 will prevent disengagement of the two hinge members except when said members are turned to bring the stud l and aperture 7 into register as will permit the stud 4: to enter the aperture and pass through the latter. The knuckle 6 is of less thickness than that of the head 5 and the outer face of the latter is cutaway at 8 to provide a shoulder or ledge 9, which latter alincs with the under face of the knuckle 6, the wall provided by the cutaway part 8 in one position, namely open position of the blind, engaging the outer face of the arm 2 and in closed position engaging the inner face of the arm 2, to thereby positively hold the blind in either of the two stated positions. The under face of the knuckle 6 seats on the top face of the arm 2, in both positions of the hinge, and since there are long surfaces which contact between the arm 2 and the head 5 of the blind leaf member, it will be apparent that a strong and effective lock is provided which will resist wind or any other element which might tend to cause movement of the hinge when in locked position. To open or close the blind, it is merely necessary to lift the blind slightly to cause the bottom face of the head 5 to clear the top face of the arm 2, whereupon the blind can be moved to desired position, and will antomatically gravitate into locked position when the wall which the cutaway part provides alines with one or the other of the two opposite vertical side faces of the arm 2. The shoulder 9, as is apparent, acts to hold or sustain the blind against downward movement, when in either open or closed position.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In a blind hinge, a leaf member including a horizontal arm having opposite flat vertical faces secured to the Window frame, a pintle extending vertically upward from the outer end of the arm and having a retaining stud on its top which extends laterally therefrom, a T-shapcd leaf member having the shank thereof secured to the blind, and a central knuckle on the head of the T-shaped member, said knuckle having an aperture which receives the stud and pintle, the under face of the knuckle seating on the top face of the arm, and the front face of the head of the T-shaped member having a cutaway part which forms a shoulder that alincs with the under face of the knuckle, said shoulder seating on the top face of the arm, the cutaway partforming a single exposed wall which is for engagement with the opposite side faces of the arm.

2. Inv a blind hinge, a member for securement to the Window frame having an arm .Which has relatively long opposed Vertical side faces, a member for securement to the blind having a relatively long substantially 5 right angular head, and means to pivotally connect said head at a point substantially central of the length thereof to the outer end of the arm, the outer face of said head being exposed to form a single long" Wall 1 Which in one position thereof engages one side face of the arm and in another position engages the opposite side face of the arm. 7

In testimony whereof I have signed my name to this specification in the presence of 15 two subscribing Witnesses.

Y JAMES H. KNOWLE-S Witnesses: o

EVERARD H. SMITH, FRANK D. GRoWELL.

Gopiea of this patent may' be obtained for five cents each, by addressing the Commissioner of 2atents.

Washington, D. G. 1 

